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NFSv4/pnfs: Clean up layout get on open 

Cache the layout in the arguments so we don't have to keep looking it up
from the inode.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2021-07-02 17:24:22 -04:00
parent 0b77f97a7e
commit b4e89bcba2
3 changed files with 18 additions and 17 deletions
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6
fs/nfs/nfs4proc.c
View File

@ -9419,7 +9419,7 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
{
struct inode *inode = lgp->args.inode;
struct nfs_server *server = NFS_SERVER(inode);
struct pnfs_layout_hdr *lo;
struct pnfs_layout_hdr *lo = lgp->lo;
int nfs4err = task->tk_status;
int err, status = 0;
LIST_HEAD(head);
@ -9471,7 +9471,6 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
case -NFS4ERR_BAD_STATEID:
exception->timeout = 0;
spin_lock(&inode->i_lock);
lo = NFS_I(inode)->layout;
/* If the open stateid was bad, then recover it. */
if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
!nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
@ -9554,9 +9553,6 @@ nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
dprintk("--> %s\n", __func__);
/* nfs4_layoutget_release calls pnfs_put_layout_hdr */
pnfs_get_layout_hdr(NFS_I(inode)->layout);
nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
task = rpc_run_task(&task_setup_data);

28
fs/nfs/pnfs.c
View File

@ -1128,8 +1128,7 @@ void pnfs_layoutget_free(struct nfs4_layoutget *lgp)
size_t max_pages = lgp->args.layout.pglen / PAGE_SIZE;
nfs4_free_pages(lgp->args.layout.pages, max_pages);
if (lgp->args.inode)
pnfs_put_layout_hdr(NFS_I(lgp->args.inode)->layout);
pnfs_put_layout_hdr(lgp->lo);
put_nfs_open_context(lgp->args.ctx);
kfree(lgp);
}
@ -2124,6 +2123,9 @@ lookup_again:
goto out_put_layout_hdr;
}
lgp->lo = lo;
pnfs_get_layout_hdr(lo);
lseg = nfs4_proc_layoutget(lgp, &timeout);
trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET);
@ -2255,6 +2257,7 @@ static void _lgopen_prepare_attached(struct nfs4_opendata *data,
pnfs_put_layout_hdr(lo);
return;
}
lgp->lo = lo;
data->lgp = lgp;
data->o_arg.lg_args = &lgp->args;
data->o_res.lg_res = &lgp->res;
@ -2263,6 +2266,7 @@ static void _lgopen_prepare_attached(struct nfs4_opendata *data,
static void _lgopen_prepare_floating(struct nfs4_opendata *data,
struct nfs_open_context *ctx)
{
struct inode *ino = data->dentry->d_inode;
struct pnfs_layout_range rng = {
.iomode = (data->o_arg.fmode & FMODE_WRITE) ?
IOMODE_RW: IOMODE_READ,
@ -2271,7 +2275,7 @@ static void _lgopen_prepare_floating(struct nfs4_opendata *data,
};
struct nfs4_layoutget *lgp;
lgp = pnfs_alloc_init_layoutget_args(NULL, ctx, &current_stateid,
lgp = pnfs_alloc_init_layoutget_args(ino, ctx, &current_stateid,
&rng, GFP_KERNEL);
if (!lgp)
return;
@ -2291,6 +2295,8 @@ void pnfs_lgopen_prepare(struct nfs4_opendata *data,
/* Could check on max_ops, but currently hardcoded high enough */
if (!nfs_server_capable(data->dir->d_inode, NFS_CAP_LGOPEN))
return;
if (data->lgp)
return;
if (data->state)
_lgopen_prepare_attached(data, ctx);
else
@ -2330,13 +2336,13 @@ void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
}
return;
}
if (!lgp->args.inode) {
if (!lgp->lo) {
lo = _pnfs_grab_empty_layout(ino, ctx);
if (!lo)
return;
lgp->args.inode = ino;
lgp->lo = lo;
} else
lo = NFS_I(lgp->args.inode)->layout;
lo = lgp->lo;
lseg = pnfs_layout_process(lgp);
if (!IS_ERR(lseg)) {
@ -2349,11 +2355,9 @@ void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
{
if (lgp != NULL) {
struct inode *inode = lgp->args.inode;
if (inode) {
struct pnfs_layout_hdr *lo = NFS_I(inode)->layout;
pnfs_clear_first_layoutget(lo);
nfs_layoutget_end(lo);
if (lgp->lo) {
pnfs_clear_first_layoutget(lgp->lo);
nfs_layoutget_end(lgp->lo);
}
pnfs_layoutget_free(lgp);
}
@ -2362,7 +2366,7 @@ void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
struct pnfs_layout_segment *
pnfs_layout_process(struct nfs4_layoutget *lgp)
{
struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout;
struct pnfs_layout_hdr *lo = lgp->lo;
struct nfs4_layoutget_res *res = &lgp->res;
struct pnfs_layout_segment *lseg;
struct inode *ino = lo->plh_inode;

1
include/linux/nfs_xdr.h
View File

@ -277,6 +277,7 @@ struct nfs4_layoutget {
struct nfs4_layoutget_args args;
struct nfs4_layoutget_res res;
const struct cred *cred;
struct pnfs_layout_hdr *lo;
gfp_t gfp_flags;
};